Pelapisan Grafena Oksida Tereduksi dari Tempurung Kelapa Tua untuk Peningkatan Konduktivitas Listrik Lithium Ferro Phosphate (LiFePO4)

Laila, Anna (2018) Pelapisan Grafena Oksida Tereduksi dari Tempurung Kelapa Tua untuk Peningkatan Konduktivitas Listrik Lithium Ferro Phosphate (LiFePO4). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Studi pengaruh pelapisan rGO untuk peningkatan konduktivitas listrik LiFePO4 telah berhasil dilakukan. Sintesis LiFePO4 menggunakan metode sol gel pada suhu kalsinasi 700oC menghasilkan fasa LiFePO4 olivine. Hasil analisis struktur mikro dengan menggunakan perangkat lunak Rietica didapatkan ukuran kristal LiFePO4 sebesar 180,5 nm. Sementara itu serbuk rGO dasar didapatkan dari pembakaran tempurung kelapa tua. Analisis uji Particle Size Analyzer (PSA) memberikan informasi bahwa distribusi ukuran partikel dari serbuk rGO dasar yaitu 289,4nm. Hasil pemanasan suhu 1000oC dan eksfoliasi secara mekanik berhasil menurunkan distribusi ukuran partikel rGO menjadi 164,72nm. Pelapisan rGO untuk meningkatkan konduktivitas listrik LiFePO4 dengan menggunakan metode pencampuran mekanik untuk membentuk strukturcore shell. Pencampuran mekanik melalui proses ultrasonikasi dan sentrifugasi. Perbandingan massa 67% LiFePO4 dan 33% rGO meningkatkan konduktivitas listrik LiFePO4 menjadi 1,63 x 10-4S/cm dari konduktivitas listrik semula 7,59 x 10-8S/cm.================================================================Study of coating employing rGO for enhancing the electrical conductivity of LiFePO4 has been successfully performed. Synthesis of LiFePO4 using sol gel method at 700oC calcination temperature has produced the olivine  phased LiFePO4. Analysis of micro structure with Rietica software resulted in the size of crystal LiFePO4 of 180.5 nm. Meanwhile, the starting rGO powder was produced form the burnt old coconut shell. Analysis of PSA shows that the averaged particle size is 289.4nm. The result of heating rGO at 1000oC temperature and mechanical exfoliation has succeeded in reducing the particle size down to 164.7 nm. The rGO coating for enhancing the electrical conductivity of LiFePO4 was carried out by mechanical mixing to form core shell structure. There are two processes of mechanical mixing, that are ultrasonication and centrifugation. The mass composition of 67% LiFePO4 and 33% rGO increased the electrical conductivity to 1.63 x 10-4 S/cm from the initial electrical conductivity of 7.59 x 10-8 S/cm.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Grafena Oksida Tereduksi (rGO), Lithium Ferro Phosphate (LiFePO4), Konduktivitas Listrik
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General) > TA455 Carbon. Nanotubes.
T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial.
Divisions: Faculty of Natural Science > Physics > 45201-(S1) Undergraduate Thesis
Depositing User: Anna Zakiyatul Laila
Date Deposited: 19 Jun 2021 15:04
Last Modified: 19 Jun 2021 15:04
URI: https://repository.its.ac.id/id/eprint/56393

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